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helpcentergmbbriefcase · 6 months ago

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What Are the Best Practices for Learning How to Use Gmail SMTP?

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Efficient email communication is crucial for personal and professional success. Gmail SMTP, a trusted solution for sending emails, provides the reliability, security, and scalability required for seamless email communication. Whether you’re setting up an email system for your business or learning how to improve email deliverability, following best practices is essential to maximize Gmail SMTP's potential.

For businesses like GMB Briefcase, mastering Gmail SMTP ensures smooth communication with clients and customers. If you need detailed guidance, the GMB Briefcase | Help Center offers expert tips and troubleshooting support.

Why Learn Gmail SMTP? Gmail SMTP (Simple Mail Transfer Protocol) allows users to send emails securely via Google’s servers. It’s a powerful tool for businesses and individuals alike, ensuring that emails reach their intended recipients without being flagged as spam or blocked.

Benefits of Learning Gmail SMTP: Enhanced Email Deliverability: Gmail’s trusted servers ensure your emails land in inboxes, not spam folders. Secure Communication: With SSL/TLS encryption, emails are safe from interception. Versatility: Gmail SMTP integrates easily with email clients, WordPress, and business platforms like GMB Briefcase. Best Practices for Learning and Using Gmail SMTP

Understand Gmail SMTP Basics Before diving into setup, familiarize yourself with the essential Gmail SMTP configuration details: SMTP Server: smtp.gmail.com Port: 587 (TLS) or 465 (SSL) Authentication: Required (Username and Password or App Password) Limits: Gmail SMTP allows up to 500 emails per day for free accounts. Understanding these details sets the foundation for a smooth setup.

Set Up Your Gmail Account Correctly To use Gmail SMTP effectively, ensure your Gmail account is configured to allow third-party access: Enable Less Secure App Access in account settings, or generate an App Password if two-factor authentication is active. Verify your email address to ensure seamless integration. If you encounter challenges during this step, visit the GMB Briefcase | Help Center for troubleshooting.

Choose the Right Tools Gmail SMTP works best with compatible email clients or software. Popular tools include: WordPress SMTP Plugins: Use plugins like WP Mail SMTP or Easy WP SMTP to integrate Gmail SMTP into your WordPress site. Email Clients: Tools like Outlook, Thunderbird, or any software supporting SMTP configuration.

Test Your Configuration Always test your Gmail SMTP setup after configuration. Send a test email to check deliverability and ensure there are no errors. Address any issues immediately to prevent disruptions in your email communication.

Prioritize Email Security Security is a top priority when using Gmail SMTP. Follow these best practices: Use an App Password instead of your Gmail account password. Avoid sharing SMTP credentials. Regularly update your Gmail password to maintain security.

Optimize for Deliverability To prevent emails from being flagged as spam: Authenticate your domain with SPF, DKIM, and DMARC records if using a custom domain. Write professional subject lines and email content. Avoid spammy phrases or excessive links. Regularly clean your email list to remove invalid or inactive addresses.

Monitor and Maintain Performance Use tools or plugins to monitor email logs, track delivery rates, and analyze email performance. The GMB Briefcase | Help Center provides resources to help you maintain and optimize your Gmail SMTP setup over time. How Gmail SMTP Benefits GMB Briefcase For businesses like GMB Briefcase, Gmail SMTP ensures reliable, secure, and professional email communication. Whether sending notifications, updates, or client responses, Gmail SMTP helps maintain trust and efficiency. With resources available at the GMB Briefcase | Help Center, businesses can easily implement and manage Gmail SMTP for their email needs.

Conclusion Learning how to use Gmail SMTP can significantly enhance your email communication. By following these best practices, you’ll ensure a secure, reliable, and professional setup tailored to your needs. Businesses like GMB Briefcase have already seen the benefits of Gmail SMTP, making it a trusted choice for secure and effective email delivery. If you need assistance at any stage, the GMB Briefcase | Help Center is your dedicated resource for expert guidance. Start implementing Gmail SMTP today and elevate your email communication strategy!

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harshavpr · 2 years ago

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“Don’t Get Hooked: Tips for Recognizing Phishing Emails”

Recognizing phishing emails with malicious links is essential to protect yourself from cyber threats. Phishing emails often attempt to deceive you into clicking on links that lead to fraudulent websites or initiate malware downloads. Here are some tips to help you identify and avoid such emails:

1.Check the Sender’s Email Address: Verify the sender’s email address. Phishing emails may use addresses that closely resemble legitimate ones but contain subtle misspellings or additional characters. Be cautious of any unfamiliar or suspicious sender.

2.Inspect the Greeting: Phishing emails often use generic greetings like “Dear Customer” instead of addressing you by name. Legitimate organizations usually personalize their emails with your name.

3.Examine the Content: Be wary of emails that create a sense of urgency, pressure you to take immediate action, or threaten negative consequences if you don’t comply. Phishing emails frequently use fear or urgency to manipulate recipients.

4.Hover Over Links: Hover your mouse pointer over any embedded links without actually clicking them. This action will reveal the true URL in the status bar of your email client. Check if the URL matches the legitimate website of the supposed sender.

5.Inspect the URL: Even if the displayed link seems legitimate, the actual URL may be different. Ensure that the domain matches the official website of the organization. Look for subtle misspellings or additional words within the URL.

6.Beware of Misspellings and Grammatical Errors: Phishing emails often contain spelling and grammatical mistakes. While legitimate organizations can make errors, a high frequency of mistakes should raise suspicion.

7.Check for Secure Connections (HTTPS): Legitimate websites use HTTPS to encrypt data. Verify that the website linked in the email begins with “https://” and displays a padlock icon in the address bar of your browser.

8.Avoid Downloading Suspicious Attachments: Don’t download attachments from unsolicited or suspicious emails. Malicious attachments can contain malware that can infect your system.

9.Verify Requests for Personal or Financial Information: Legitimate organizations usually do not request sensitive personal or financial information via email. If in doubt, contact the organization through official channels to confirm the request’s authenticity.

10.Use Email Filtering Software: Enable email filtering and spam detection in your email client or use dedicated email security solutions to automatically identify and quarantine phishing emails.

11.Trust Your Instincts: If something about an email seems off or too good to be true, trust your instincts. It’s better to be cautious and skeptical than to fall for a phishing scam.

12.Educate Yourself and Others: Stay informed about the latest phishing techniques and educate yourself and your colleagues or family members about the risks and how to recognize phishing attempts.

13.Watch for Email Spoofing: Some phishing emails may use techniques to make it appear as if they’re coming from a legitimate source. Look for inconsistencies between the sender’s display name and the actual email address.

14.Beware of Unsolicited Attachments: Be cautious when you receive unexpected attachments or files in an email, especially if they come from unknown sources. Malware can be hidden in these attachments.

15.Cross-Check Information: If you receive an email that requests action on your part, such as changing a password, making a payment, or updating account information, independently verify the request. Contact the organization through official channels or visit their website directly, rather than clicking on the provided link.

16.Use Email Authentication Technologies: Some email providers and organizations use email authentication protocols like SPF, DKIM, and DMARC. These technologies help verify the authenticity of emails. Legitimate senders often employ these security measures.

17.Be Wary of Pop-Up Forms: Some phishing emails might lead to a webpage that includes pop-up forms asking for personal information. Avoid entering sensitive data into such forms unless you are sure of their legitimacy.

If you want to learn more about it, I highly recommend that you contact ACTE Technologies because they offer certifications and job placement opportunities. Experienced teachers can help you learn better. You can find these services both online and offline.

If you feel that my response has been helpful, make sure to follow me and it will encourage me to upload more content about Ethical hacking.

Thanks for spending your valuable time . Have a great day

#ethicalhacking #hacking #cybersecurity

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cybersecurityinfo · 4 years ago

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Tips to Ensure the Prevention of Spoofing, Phishing, and Spam in Google Workspace

With increasing dependency on the web and modernization of the industries moving to the cloud, data security and vulnerability to scams have become a major point of concern. Spoofing, Phishing, Spams are few threats an individual or an entire organization is always prone to in the current scenario.

Now, what do these terms- Spoofing, Phishing, and Spamming mean?

Spoofing- is a criminal activity where a scammer tries to get access to someone's personal information by pretending to be a legitimate business.

Phishing-Phishing attacks are always ensuring you are who you say you are and that any information you provide is genuine. There have been several recent high-profile cyber breaches involving UK government departments. Information that could uncover sources of classified information has been released online, compromising military and diplomatic networks. This has resulted in the necessity for individuals to train themselves how to spot phishing scams in their own inboxes.

The most common source of phishing attacks are emails sent to employees or customers that seem to come from legitimate sources but are loaded with malicious macros or spyware hiding amongst legitimate documents or other material designed to infiltrate computer systems. Aside from trivializing the browsing experience of those who receive them, these tactics also serve as a boon for scammers looking to infiltrate employee or business networks to steal data or infiltrate organizations in hopes of causing financial harm.

Spamming-It is important to understand that there is a difference between spamming and unwanted email. Unwanted email is unwanted because it is bulk and impersonal. Spamming, on the other hand, is personalized and comes from a genuine place. If you want something from someone (an answer to a question, for example), it's important not to fall for the tactics used by spammers. Email marketing has become one of the most potent forms of internet marketing, used to send out hundreds or even thousands of emails to thousands of recipients in an attempt to build a database of potentially interested parties. This forms a huge part of spamming as it will always outnumber genuine emails, which makes it much easier to identify and deal with spam messages.

If you send mass emails without looking for feedback or educational purposes, you run a high risk of spammers finding your address and sending you junk mail. Avoid making purchases from sources that offer free shipping or require you to validate your ID before getting your products. Avoid sending out marketing emails unless you have a good relationship with the senders and can trust them to deliver only legally obtained products or services. It's important to realize that today's social networking is a whole-of-communication platform wherein every message or piece of content is equally available to everybody within a given circle. This creates the urgent need to fight spamming and connect people in a more constructive way. Of late, social networking sites have introduced a feature wherein you can report spamming emails or social media posts to the respective service providers.

Below are a few tips that an Admin of an Organization who has just moved into.

cloud emails with Google Workspace can implement in order to prevent the threats.

Sender policy framework is an email authentication technique that publishes authorized mail servers to send emails for your domain. SPF protects your domain from spoofing and helps to ensure that messages are delivered correctly. It has been designed to improve the overall security of e-mail communication by creating a visible reputation system for sending e-mail messages from an organization. Consequently, SPF also helps avoid spamming. Mail servers verify the origin of emails using the Domain Name System (DNS) records. An SPF record is included in each email message, indicating which mail servers issued the email.

If a domain is registered with multiple mail service providers, then each provider will forward mail to the corresponding mail server. However, since these providers may not keep a consistent record of who owns what domain, SPF falls short of protecting against spoofing and human error. Sender Policy Framework is an email authentication technique that publishes authorized mail servers to send emails for your domain. SPF protects your domain from spoofing and helps to ensure that messages are delivered correctly. SPF prevents spoofing using Gmail accounts by default; however, you can change this behavior and return mail to the sender by including an SPF record in your domain's MX records or adding Spam Warning in your email Header (as well as any other Within Network record).

DomainKey Identified Mail (DKIM) is a protocol that improves email delivery security. It can be used for several purposes, but most importantly it improves message authentication. By ensuring that messages are signed by the actual domain owner, it enables the originator to be verified and protected when sending emails from an address that might not be authorized. The problem with relying solely on email providers to implement domain key-based e-mail protection is that they often implement it in a way that makes it difficult for spammers to hide their identities.

This is why you have to find ways to ensure that your DKIM signed emails aren't automatically deleted by your recipient's mail client or server. You can prevent spammers from sending you spam emails by following best practices for email filtering. By implementing a spam filter, you can also quickly identify when a message is from a known source. Spam filters use DomainKeys Infrastructure (DKI), a public key infrastructure for email domains. When you communicate with an email server using HTTPS, both sides of the communication have a private, randomly generated key a DomainKeys Header. This is used to encrypt the data flow between your computer and the email server. It prevents spoofing of your identity across different servers.

Any changes to your domain will result in the email service using DMARC to send an alert to your at least local domain administrators, including the senior management if there are changes made on the upper-level domain DNS is used to resolve the domain name into an IP address. Without this step, a fake site could still be displayed in your browser because the browser would interpret the domain name as referring to a real server instead of the intended one.

Domain-based Message Authentication, Reporting, and Conformance or DMARC record is a standardized email authentication method used by organization admins to prevent hackers and other scammers from spoofing their domain. It also helps the admins to request reports that get messages from the company or domain from email servers and It also helps the admins to request reports that get messages from the company or domain from email servers. To help them recognize malicious activity and potential authentication problems for messages sent from their domain, these reports have details.

The 3 major security measures of DKIM, DMARC, and SPF that Google recommends to ensure the prevention of spoofing, phishing, and spam in Google Workspace boosts an organization’s dependency and helps them explore a secure email solution like Google Workspace.

Source :-https://atozcybersecurity.blogspot.com/2021/09/tips-to-ensure-prevention-of-spoofing.html

#DMARC #DKIM #phishing attack #SPF

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ariyarathi · 3 years ago

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5 Best Practices for Improving Organizational Email Security

Even when discussing sensitive information such as customer account numbers, employee credentials, and confidential negotiations, most firms use email as their primary medium of communication. Businesses must keep in mind, however, that not all email conversations are as private as they imagine.

One negligent employee's actions might compromise the safety and security of the entire firm. To fight this, every company must take proactive actions to increase its security, such as increasing cyber awareness. Here are some examples of how organizations can do so:

· Using Strong and Unique Passwords

Passwords are like keys; they open every secret cave in an organization. As a result, it's critical to create strong, one-of-a-kind passwords for each account in your firm. A simple ‘Open Sesame’ command will result in several hacking and brute force assault attempts. Make use of a mix of lower and upper case alphabets, numbers, and special characters. Use a third-party password manager if you have difficulties remembering passwords. Use a password management system such as two-factor authentication (2FA), which is extensively used on social networking platforms these days, to offer an extra layer of security. A strong password may save you a lot of time and effort.

· Awareness Campaigns

Conducting security awareness programs in your business helps to instill critical thinking in your personnel, making them alert and ready for any incoming assault. Training may save your company millions of dollars. According to IBM research, human error is responsible for 19 out of every 20 data breaches worldwide. This highlights the underlying urgency of the problem, as well as the fact that practically every significant cyber assault can be avoided if staff is adequately trained in cybersecurity.

· Encrypting Your Emails

The technique of encoding information is known as encryption. This procedure changes the original information representation, known as plaintext, into an alternate form known as ciphertext. This helps you safeguard the contents of any critical emails and protects your email channels from unwanted usage if compromised. As a result, organizations must constantly encrypt crucial correspondence.

· Enforce DKIM, SPF, and DMARC

Email authentication protocols such as DKIM, SPF, and DMARC solution protect your domain from being spoofed or phished. These protocols use various methods to ensure that outbound and inbound emails cannot be faked by an impostor. These measures bolster brand security as well as brand image. A customer is more likely to trust a secure brand rather than an unsecured one.

· Updated Software

Every piece of software needs to be updated on a regular basis in order to keep up with the ever-changing strategies used by cyber attackers. It is critical to understand vulnerabilities and to deploy updates and patches on a regular basis. Updating your software guarantees that your systems are ready to combat new viruses and malware.

DKIM, DMARC, and SPF can help tenfold when it comes to fighting phishing. To learn more about these, log on to EmailAuth. EmailAuth is the one-stop solution for all your email authentication needs. It has a plethora of email security services. The DMARC solution comes with timely DMARC aggregate reports and it mentions DMARC self-setup guides. The benefits of DMARC are unparalleled. So don’t wait anymore; secure your domain today!

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cyber-security-news · 4 years ago

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SPF Validation Errors and How to Troubleshoot them

Sender Policy Framework (SPF) is an email authentication mechanism used by domain owners and organizations to review emails sent by other companies to tackle phishing attempts on their domains. However, these records can be configured incorrectly due to their complex nature, resulting in validation errors such as "SPF validation failed". A scenario like this can be time-consuming and costly for the company. In this article, we explain why an SPF validation error occurs and how they can be fixed.

SPF Validation Error

If the Sender Policy Framework (SPF) validation fails for a sender's domain, an SPF validation error can occur. Records in SPF format must be well-formed. However, even well-formed SPF records can occasionally generate warnings stating that the SPF information is configured incorrectly.

Top 10 Causes of SPF Validation Errors

Multiple SPF records: Each domain should have only one SPF record for each SPF version. Users should never add a new record next to an existing one, rather update old records.

SPF validation not available: SPF validation may not be available because there is no SPF record for the domain.

Too many DNS lookups: Users can only perform 10 nested DNS lookups at a time. If you exceed this limit, the SPF check will fail.

Syntax error: SPF record must be structured correctly. It must start with the tag ��v = spf1’ and end with the tag ‘all’. Both tags need to be used only once in an SPF entry.

Using the PTR mechanism: PTR is an obsolete technique and when used, senders can ignore SPF entries.

Unknown parts: Content that is not part of the SPF standard may have been inserted.

Invalid macros: SPF macro settings may be incorrect.

No record termination: The standard backup mechanisms for SPF records should be ‘all’ methods or ‘redirect’ modifiers.

Multiple backup scenarios: There should only be one backup option in SPF records.

DNS type ‘SPF’ use: RFC 7208 made the DNS ‘SPF’ (/ 99) obsolete. DNS TXT resource records (type 16) must be used to publish SPF records.

Meaning of "Error SPF Validation Failed Mode Normal"

Emails sent by marketers may bounce back for a variety of reasons. When the validation fails, those sending the email may get a "554 Denied Mode Normal" SMTP error from the remote mail server. The most common cause of a "554 Denied" issue is faulty reverse DNS or greylisting.

Error Greylisted emails are referred to as postponed in messages. Greylisting is a spam-prevention technique used by mail servers. Consider the case where a sender isn't on a whitelist and the receiving server employs greylisting. In that scenario, the receiving server temporarily rejects the message, and a bounce back-like return message is produced with the temporary fault mentioned. Senders should, therefore, ask receivers to add them to their whitelist to avoid getting greylisted.

SPF verification problems may arise, and the SPF record may need to be updated. To do reverse DNS lookups, MX records must be linked with a record that has a PTR record. If forwarding services are utilized, forward IPs should also be added to the SPF1 record. Moreover, a valid record can be generated using an online SPF generator.

As demonstrated above, SPF validation failure notifications might be issued for a variety of reasons. Configuring SPF records correctly and avoiding common mistakes may significantly improve email deliverability rates and reduce spam. To check your SPF record, use EmailAuth’s free SPF checker tool.

Original source: https://www.reddit.com/user/emailauth-io/comments/qg1c2q/spf_validation_errors_and_how_to_troubleshoot_them/

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sololinuxes · 6 years ago

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Debian 10.2, listo para su descarga

Debian 10.2, listo para su descarga.

Debian es una de las mejores distribuciones Linux por derecho propio, pero no es solo eso, también es una base sólida para otras distribuciones. Cuando se lanza una nueva versión de Debian, el impacto en otras grandes distribuciones entre las que se incluye Ubuntu es tremendo. Desde hoy, ya podemos descargar la nueva versión de Debian 10 "Buster"; Debian 10.2. OJO!!!, Debian 10.2 no es la panacea de revoluciones, pero si nos trae algunas mejoras interesantes y otras actualizaciones. La nueva versión 10.2, nos aporta esperadas actualizaciones de seguridad, corrección de errores, y por fin... la desaparición de Mozilla ESR (Extended Support Release), pero no te preocupes, si eres usuario de escritorio no notaras ninguna diferencia. Anuncio oficial de Debian: El proyecto Debian se complace en anunciar la segunda actualización de su distribución estable Debian 10 (nombre en clave 'buster'). Esta versión puntual agrega principalmente correcciones para problemas de seguridad, junto con algunos ajustes para problemas graves. Las advertencias de seguridad ya se han publicado por separado y están todos ellos están referenciados en nuestras listas. Continua: Debes tener en cuenta que el lanzamiento es puntual por motivos de seguridad, y no constituye una nueva versión de Debian 10, sino que solo actualiza algunos de los paquetes incluidos. Después de la instalación, los paquetes se pueden actualizar a las versiones actuales que utilizan un espejo de Debian actualizado. Los usuarios que instalan diariamente actualizaciones desde security.debian.org no tendrán que actualizar a la nueva versión, la mayoría de esas actualizaciones ya están incluidas en el nuevo lanzamiento. Bugfixes y actualizaciones varias: El Proyecto Debian comparte con "sololinux.es" los cambios efectuados en su nueva versión. Paquete Solución a... aegisub Fix crash when selecting a language from the bottom of the Spell checker language list; fix crash when right-clicking in the subtitles text box akonadi Fix various crashes / deadlock issues base-files Update /etc/debian_version for the point release capistrano Fix failure to remove old releases when there were too many cron Stop using obsolete SELinux API cyrus-imapd Fix data loss on upgrade from version 3.0.0 or earlier debian-edu-config Handle newer Firefox ESR configuration files; add post-up stanza to /etc/network/interfaces eth0 entry conditionally debian-installer Fix unreadable fonts on hidpi displays in netboot images booted with EFI debian-installer-netboot-images Rebuild against proposed-updates distro-info-data Add Ubuntu 20.04 LTS, Focal Fossa dkimpy-milter New upstream stable release; fix sysvinit support; catch more ASCII encoding errors to improve resilience against bad data; fix message extraction so that signing in the same pass through the milter as verifying works correctly emacs Update the EPLA packaging key fence-agents Fix incomplete removal of fence_amt_ws flatpak New upstream stable release flightcrew Security fixes fonts-noto-cjk Fix over-aggressive font selection of Noto CJK fonts in modern web browsers under Chinese locale freetype Properly handle phantom points for variable hinted fonts gdb Rebuild against new libbabeltrace, with higher version number to avoid conflict with earlier upload glib2.0 Ensure libdbus clients can authenticate with a GDBusServer like the one in ibus gnome-shell New upstream stable release; fix truncation of long messages in Shell-modal dialogs; avoid crash on reallocation of dead actors gnome-sound-recorder Fix crash when selecting a recording gnustep-base Disable gdomap daemon that was accidentally enabled on upgrades from stretch graphite-web Remove unused send_email function ; avoid hourly error in cron when there is no whisper database inn2 Fix negotiation of DHE ciphersuites libapache-mod-auth-kerb Fix use after free bug leading to crash libdate-holidays-de-perl Mark International Childrens Day (Sep 20th) as a holiday in Thuringia from 2019 onwards libdatetime-timezone-perl Update included data libofx Fix null pointer dereference issue libreoffice Fix the postgresql driver with PostgreSQL 12 libsixel Fix several security issues libxslt Fix dangling pointer in xsltCopyText lucene-solr Disable obsolete call to ContextHandler in solr-jetty9.xml; fix Jetty permissions on SOLR index mariadb-10.3 New upstream stable release modsecurity-crs Fix PHP script upload rules mutter New upstream stable release ncurses Fix several security issues and other issues in tic ndppd Avoid world writable PID file, that was breaking daemon init scripts network-manager Fix file permissions for /var/lib/NetworkManager/secret_key and /var/lib/NetworkManager node-fstream Fix arbitrary file overwrite issue node-set-value Fix prototype pollution node-yarnpkg Force using HTTPS for regular registries nx-libs Fix regressions introduced in previous upload, affecting x2go open-vm-tools Fix memory leaks and error handling openvswitch Update debian/ifupdown.sh to allow setting-up the MTU; fix Python dependencies to use Python 3 picard Update translations to fix crash with Spanish locale plasma-applet-redshift-control Fix manual mode when used with redshift versions above 1.12 postfix New upstream stable release; work around poor TCP loopback performance python-cryptography Fix test suite failures when built against newer OpenSSL versions; fix a memory leak triggerable when parsing x509 certificate extensions like AIA python-flask-rdf Add Depends on python{3,}-rdflib python-oslo.messaging New upstream stable release; fix switch connection destination when a rabbitmq cluster node disappears python-werkzeug Ensure Docker containers have unique debugger PINs python2.7 Fix several security issues quota Fix rpc.rquotad spinning at 100% CPU rpcbind Allow remote calls to be enabled at run-time shelldap Repair SASL authentications, add a 'sasluser' option sogo Fix display of PGP-signed e-mails spf-engine New upstream stable release; fix sysvinit support standardskriver Fix deprecation warning from config.RawConfigParser; use external ip command rather than deprecated ifconfig command swi-prolog Use HTTPS when contacting upstream pack servers systemd core: never propagate reload failure to service result; fix sync_file_range failures in nspawn containers on arm, ppc; fix RootDirectory not working when used in combination with User; ensure that access controls on systemd-resolved's D-Bus interface are enforced correctly ; fix StopWhenUnneeded=true for mount units; make MountFlags=shared work again tmpreaper Prevent breaking of systemd services that use PrivateTmp=true trapperkeeper-webserver-jetty9-clojure Restore SSL compatibility with newer Jetty versions tzdata New upstream release ublock-origin New upstream version, compatible with Firefox ESR68 uim Resurrect libuim-data as a transitional package, fixing some issues after upgrades to buster vanguards New upstream stable release; prevent a reload of tor's configuration via SIGHUP causing a denial-of-service for vanguards protections

Descargar Debian 10.2

Cada vez que se lanza una nueva versión en debian, modifican los directorios de descarga originales, así que en sololinux hemos decidido modificar nuestra política de enlaces, e insertamos el original de la versión CD-LIVE comentada en el articulo. Descargar Debian 10.2. Si por otros motivos, necesitas descargar otra versión, puedes descargarlas todas desde este articulo anterior. Espero que este articulo te sea de utilidad, puedes ayudarnos a mantener el servidor con una donación (paypal), o también colaborar con el simple gesto de compartir nuestros artículos en tu sitio web, blog, foro o redes sociales. Read the full article

#debian #Debian10.2 #DescargarDebian10.2 #listoparasudescarga #MozillaESR #security.debian.org #sololinux.es #ubuntu

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cybercrew · 6 years ago

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Always data Direct Bug Bounty Program

About alwaysdata

alwaysdata and its subsidiaries constitute a hosting provider that offer a PaaS solution for everyone since 2006, but is particularly focused on developers everyday-use.

alwaysdata platform is designed to host hundreds of accounts on each server. Each account get a full access to all wanted interpreters, various databases, email accounts, brokers1), backups, various remote access, an API to control settings, etc. Each account can host as many websites as wanted.

Program Rules

We believe that no technology is perfect and that working with skilled security researchers is crucial to identify weaknesses in our technology. If you believe you’ve found a security bug in our service, we are happy to work with you to resolve the issue promptly and ensure you are fairly rewarded for your discovery.

Let us know as soon as possible upon discovery of a potential security issue, and we’ll make every effort to quickly resolve the issue. Provide us a reasonable amount of time to resolve the issue before any disclosure to the public or a third-party.

Test vulnerabilities only against accounts that you own or accounts that you have permission from the account holder to test against.

Never use a finding to compromise/ex-filtrate data or pivot to other systems. Use a proof of concept only to demonstrate an issue.

If sensitive information — such as personal information, credentials, etc. — is accessed as part of a vulnerability, it must not be saved, stored, transferred, or otherwise accessed after initial discovery. All sensitive information must be returned to alwaysdataand any copies of such information must not be retained.

Any type of denial of service (DDoS) attacks is strictly prohibited, as well as any interference with network equipment and alwaysdata infrastructure.

Do not try to over exploit the bug and access internal data for further vulnerabilities. We will determine the severity and reward accordingly.

If you find the same vulnerability several times, please create only one report and eventually use comments. You’ll be rewarded accordingly to your findings.

Violation of any of these rules can result in ineligibility for a bounty and/or removal from the program.

Legal considerations

We will not pursue civil action or initiate a complaint to law enforcement for accidental, good faith violations of this policy. We consider activities conducted consistent with this policy to constitute “authorized” conduct. We will not bring a claim against you for circumventing the technological measures we have used to protect the applications in scope of this program.

If legal action is initiated by a third party against you and you have complied with this security policy, we will take steps to make it known that your actions were conducted in compliance with this policy.

It is also important to note, we will not take legal action against you simply for providing us with a proof of concept of the security vulnerability. Please follow the guidelines listed in the Proof of concepts section below to ensure that your proof of concept is detailed enough to demonstrate the issue and still follows the guideline listed above.

Scope and Testing

https://www.alwaysdata.com

https://admin.alwaysdata.com

https://webmail.alwaysdata.com

https://api.alwaysdata.com

ssh://ssh-[accountid].alwaysdata.net

https://webdav-[accountid].alwaysdata.net

ftp://ftp-[accountid].alwaysdata.net

Vulnerabilities reported on other services or applications are not allowed.

Provide your IP address in the bug report. We will keep this data private and only use it to review logs related to your testing activity.

Include a custom HTTP header in all your traffic. Burp and other proxies allow the easy automatic addition of headers to all outbound requests. Report to us what header you set so we can identify it easily. For instance:

A header that includes your username: X-Bug-Bounty:Hacker-[accountid]

A header that includes a unique or identifiable flag X-Bug-Bounty:ID-[sha256-flag]

When testing for a bug, please also keep in mind:

Use test accounts so as not to inadvertently compromise the privacy of our users.

When attempting to demonstrate root permissions with the following primitives in a vulnerable process please use the following commands:

Read: cat /proc/1/maps

Write: touch /root/<accountid>

Execute: id, hostname, pwd2)

Minimize the mayhem. Adhere to program rules at all times. Do not use automated scanners/tools — these tools include payloads that could trigger state changes or damage production systems and/or data.

Before causing damage or potential damage: Stop, report what you’ve found and request additional testing permission.

Rewards

Hall of Fame

We’ll be pleased to credit you in our HoF at /fr/transparence/ for your reports until patches are applied.

We mention our security partnerships on our social networks accounts (e.g. https://twitter.com/alwaysdata).

If you report critical vulnerabilities, we’ll be pleased to interview you as a security researcher, and publish the interview in our blog at https://blog.alwaysdata.com/.

Swag

We offer t-shirts, swag stuff and/or vouchers as rewards for validated reports, within the limit of an expedition to the EU only. We are regularly invited to conferences worldwide, we can get in touch to give you your swag during those events.

Cash

Our minimum reward is €50.

The following is merely an indicator of rewards, but does not reflect what the final decision might be. We value quality reports and proofs of concepts.

QualificationExamples of vulnerabilities (non-comprehensive list)Score CVSSBounty

NoneN/ANo Bounty

LowAccessing restricted parts of third-party elements or their plugins (blog, forum, etc.)0.1 - 3.9Up to €50

MediumAccessing permissions/config on users account w/o accessing their content4.0 - 6.9Up to €200

HighAccessing customers data/informations7.0 - 8.9Up to €350

CriticalAccessing in read or read-write mode to the core platform architecture9.0 - 10.0Up to €500

Eligibility and Responsible Disclosure

We are happy to thank everyone who submits valid reports which help us improve the security of alwaysdata. However, only those that meet the following eligibility requirements may receive a monetary reward:

You must be the first reporter of a vulnerability.

The vulnerability must be a qualifying vulnerability (see below).

Any vulnerability found must be reported no later than 24 hours after discovery and exclusively through our ticketing solution.

You must send a clear textual description of the report along with steps to reproduce the issue, include attachments such as screenshots or proof of concept code as necessary.

You must avoid tests that could cause degradation or interruption of our service (refrain from using automated tools, and limit yourself about requests per second).

You must not leak, manipulate, or destroy any user data.

You must not be a former (1 year) or current employee of alwaysdata, or one of its contractor.

Reports about vulnerabilities are examined by our security analysts. If you need to encrypt payload, we strongly recommend you to use the 0xDFDD2138A363986B GPG public key. Reports must be submitted using our ticketing interface available at https://admin.alwaysdata.com/support/.

Please avoid to report directly by email.

Our analysis is always based on worst case exploitation of the vulnerability, as is the reward we pay.

Time to first response: 2 business days or less. Time to triage: 3 business days or less.

We are continuously working to evolve our bug bounty program. We aim to respond to incoming submissions as quickly as possible and make every effort to have bugs fixed within 10 days of being triaged. Rewards will be paid when patch is applied.

No vulnerability disclosure, including partial, is allowed before the patch is applied and we agree the publication.

Proof of concepts

XSS: For XSS, a simple alert(document.domain) should suffice.

RCE: Please only execute harmless code. Please refer to the Testing section.

SQLi: Report it as soon as you have a SQL error that indicates SQL injection or you are able to disclose the SQL server’s version number.

Unvalidated redirect: Set the redirect endpoint to http://example.com if possible.

CSRF: Either attach a file to demonstrate the issue or paste the code in a code block in your report.

SSRF: Do not go playing around on any internal networks. Report as soon as you believe that you have a potential SSRF issue and we will look into it for you.

LFI: The same applies here — please do not go against the guideline listed in the Program Rules section. We investigate LFI reports in a dev environment to make sure it is valid.

Qualifying Vulnerabilities

SQL Injection.

Finding numeric user id (even yours).

Exposure of Sensitive members information3).

Exposure of internal tools.

Exposure of configuration files or secrets.

Directory Traversal Issues.

Local files access and manipulation (LFI, RFI, XXE, SSRF, XSPA).

Local File Disclosure (LFD).

Code injections (HTML, JS, SQL, PHP, …).

Cross-Site Scripting (XSS).

Cross-Site Requests Forgery (CSRF) with real security impact.

Server-Side Request Forgery (SSRF).

Open redirect.

Remote Code Execution (RCE).

Broken authentication & session management.

Insecure direct object references.

CORS with real security impact.

Missing “secure” flags on authentication cookies.

Access Control Issues.

Horizontal and vertical privilege escalation.

Findings not eligible for bounty

Any hypothetical flaw or best practices without exploitable POC.

Missing security-related HTTP headers which do not lead directly to a vulnerability.

Presence/absence of SPF/DMARC records.

Reports of insecure SSL/TLS ciphers (unless you have a working proof of concept).

Mixed content warnings.

Brute force / password reuse attacks.

User enumeration attacks.

Premium phone numbers attacks.

Disclosure of known public files or directories, (e.g. robots.txt).

Massive automated actions on the platform through robots/crawling (except if it gathers sensitive information from members).

“Self” XSS.

Missing cookie flags.

SSL/TLS best practices.

Mixed content warnings.

Denial of Service attacks.

“HTTP Host Header” XSS.

Clickjacking/UI redressing.

Software version disclosure.

Stack traces or path disclosure.

Physical or social engineering attempts.

Recently disclosed 0-day vulnerabilities.

Presence of autocomplete attribute on web forms.

Vulnerabilities affecting outdated browsers or platforms.

Issues that require physical access to a victim’s computer/device.

Logout and other instances of low-severity Cross-Site Request Forgery.

Missing security-related HTTP headers which do not lead directly to a vulnerability.

Reports from automated web vulnerability scanners (Acunetix, Vega, etc.) that have not been validated.

Reports about third-party applications we provide to our customers but aren’t part of our system directly (phpMyAdmin, Roundcube Webmail, etc.), if the vulnerability doesn’t directly exposes customers data and/or metadatas.

Reports on third-party applications that we provide to our customers but are not directly part of our system (phpMyAdmin, Webmail Roundcube, etc.), unless the vulnerability that exposes user data and/or metadata is fixed for more than a month in the upstream version and we are not up to date.

Reports about know vulnerabilities in sub-component parts (e.g. OpenSSH) that are just being disclosed. We aim to apply security patches in 30 days or less, so reports that concern to recent disclosed vulnerabilities are not relevant.

Reports about sites or applications hosted by our customer, except if the vulnerability is due to our platform in conjunction with the customer application.

Source code: https://www.alwaysdata.com/fr/bug-bounty/

When more information is released our blog will be updated

Read More Cyber New’s Visit Our Facebook Page Click the Link : https://www.facebook.com/pages/Cyber-crew/780504721973461

Read More Cyber New’sVisit Our Twitter Page Click the Link : https://twitter.com/Cyber0Crew

~R@@T @CCE$$~

#~R@@T @cce$$~

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johnattaway · 6 years ago

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Who Thunderbird Backup Email Zip

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quickclickhosting · 6 years ago

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robertbryantblog · 6 years ago

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minnievirizarry · 8 years ago

Text

How to Reduce Email Bounce Rate

Email marketing bounce rate is a metric that calculates the number of emails returned to sender.

Bounced email addresses hurt your sender reputation and have a negative effect on your delivery rate. The closer your bounce rate to zero, the better it is.

There can be many reasons why your email “bounced.” Discover common mistakes to avoid and efficient ways to reduce your email bounce rates to a minimum.

Email marketing has come a long way. Some marketers don't consider email marketing to be as effective as it used to be.

However, when approached the right way, email marketing proves to be the cornerstone of successful marketing campaigns.

Numerous factors define effective email marketing strategy: from headline to “send from” name.

Yet keeping an eye on your bounce rate - and taking action to reduce it - is the foundation of a rewarding email campaign.

Before we dive into the ways to cut your bounce rates short, you need to distinguish between two types of email bounces.

Bounces can be categorized as hard or soft depending on whether the error is permanent or solvable.

What Is a Hard Bounce?

Hard bounce means permanent delivery failure. It happens when the email address fails and is not accepted by the recipient’s mail server.

Hard bounce can occur for a number of reasons, such as a typo in the email address or the email is no longer in use.

What Is a Soft Bounce?

A soft bounce occurs when the email bounces back to the sender after being accepted by the recipient’s server.

Email is categorized as a soft bounce when there is a temporary error. For instance:

The mailbox has reached its full capacity

There is an issue with the receiving server

The email is identified as too large

Your email sender reputation directly impacts your deliverability rates.

Therefore, it is important to keep your bounce rates low to maintain good email sender reputation.

What Bounce Rate Is Too High?

The best way to track your bounce rate statistics is through the results in your email analytics reports. Bounce rates vary for many different reasons, even within the same industry.

However, if you need a benchmark to refer to, MailChimp offers industry-specific soft and hard bounce rate data.

This data is collected based on at least 1,000 email campaign subscribers from companies of various sizes within the same industry. Use it as your basic reference point.

1. Keep Your Lists Clean

Bounces occur because your email list is stale or out-of-date. One way to keep your list clean is to keep in touch with your subscribers regularly.

Make sure to always provide an option to unsubscribe or update preferences.

Furthermore, do not use your first email campaign to clean your list from outdated or invalid email addresses.

You will end up spending a lot of time and resources restoring your email sender reputation as a consequence.

If your current mailing list has not been used for over 6 months, try third-party services that offer bulk email verification and list-cleaning tools.

An example is the service offered by Byteplant.

2. Use Permission-Based Email List

Low bounce rates start with building permission-based email lists. Get good quality subscribers via your homepage, social media pages, checkout, and registration form.

Always provide a clear opt-in checkbox.

Do not use problematic sources for subscriber acquisition. These sources include bought or scraped email lists and co-registration opt-in.

Litmus provides top problematic resources for email list subscriber acquisition that will most certainly have a negative impact on your bounce rates.

In addition, you can use the double opt-in option for users to subscribe to your email list.

Once the user fills out your sign-up form, confirmation email will be automatically sent out to their inbox.

The user will be added to your mailing list only once they confirm their email address.

Double opt-in will allow you to avoid any bots, spammers, and typos. While it may seem tempting to make the sign-up as easy as possible for your potential subscribers, you will benefit much more from a double opt-in contact list in the long run.

3. Be Consistent With Your Emails

The more consistent your email schedule is, the more chances that your subscribers will not forget that they’ve consented to receive emails from you.

Keep some sort of email campaign agenda planned ahead of time to avoid any possible issues with spam complaints and bounce rates.

Regular email campaign schedule will keep your list up-to-date.

There is no “one-size-fits-all” when it comes to email frequency. Keep your subscribers and industry in mind when deciding how often to send your emails.

4. Steer Clear of Spam Filters

As obvious as it may be, avoid creating emails that are treated like spam by the filters.

Spam filters change their tactics over time so keep an eye on your email templates, content and links to avoid triggering spam filters.

Run spam filter tests and analyze deliverability results. Check the spamminess of your emails with tools like Mail Tester.

5. Do Not Use Free Sender Domains

Using free email send-from domains like “@gmail.com” will make your emails bounce or re-rooted to spam folder.

Use your business domain name instead. Your emails will not pass the DMARC policy check for Yahoo, Gmail, and AOL if you are using a free send-from domain.

6. Authenticate Your Domains

According to a Litmus study, one of the top sources for email marketing statistics, less than 40% of brands use three major methods of email authentication: SPF, DKIM, DMARC.

Domain authentication will positively influence your deliverability rates and decrease bounce rates. It will also prevent spoofing and security alerts to your subscribers.

Keep a close eye on your bounce rates and delivery reports. You should take appropriate action to fix any bounce rate issues as soon as possible.

It can be a very costly and lengthy process to fix any negative consequences.

Analyze your delivery reports and check if there are hard or soft bounces from any specific email domain.

Update your opt-in options and email templates. Make sure that email authentication is in place.

Following these six steps is a no-brainer and will allow you to keep your email marketing campaigns effective.

Never Stop Testing

Email marketing is a dynamic channel so what does not work today might work tomorrow.

The key here is to use any negative results to your advantage.

When approached correctly, email marketing is a failure-friendly channel as it requires minimal initial investments.

Experiment with A/B testing, various templates, send-from names and scripts. But most importantly, learn from any negative email campaign results.

Do not let the fear of failing deprive you of any potential success.

Watch your email reports closely to increase your competitiveness and deliver the right messages to your audience.

Jane Shel is a co-founder and content strategist at MiroMind SEO & Digital agency. Self-starter and blog-reader, she likes to share her know-how in digital marketing world.

The post How to Reduce Email Bounce Rate appeared first on Ninja Outreach.

from SM Tips By Minnie https://ninjaoutreach.com/email-bounce-rate/

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webdesignersolutions · 8 years ago

Link

Hey everyone on /r/webhosting, Tl;dr Our emails were being marked as spam and users were not getting them. Below, I give guidance from my own experience, how to modify the SPF record to avoid failing authentication and email perm errors. via Pocket

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cyber-security-news · 4 years ago

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4 Common Mistakes To Avoid While Creating An SPF Record

Sender Policy Framework ( SPF) is an email authentication system that lets you decide the IP addresses to send email from your domain. The servers receiving emails examine the SPF record of all emails that come in. A message sent through your domain can only be authenticated if the IP address is recorded within the SPF record.

Simple and easy to implement, SPF can significantly improve email security and reduce phishing and spam attacks. But, SPF also has some limitations that could make it a bit difficult to use correctly. Here are the 4 most frequent mistakes people make when they implement SPF, which you must be sure to avoid at all costs.

#1 EXCEEDING THE SPF 10-LOOKUP LIMIT

To determine whether an email has passed SPF authentication, the email servers receiving the message might need to perform several DNS lookups. However, to safeguard the receiving mail servers from attacks that could cause a denial of service, they are not allowed to conduct at least 10 lookups when reviewing the SPF record of the inbound email.

If you exceed the DNS limit on lookups, authentication or validation of your domain could be broken, allowing threat actors to use your domain. That means that after the limit is reached, each email that needs the use of a DNS search won't yield the desired outcome. You may receive several messages that do not send out without giving you any warning.

The excessing limit of the SPF 10 lookup limits is among the gravest errors you can commit when making an SPF record. It can affect the reputation of your domain and its ability to deliver. SPF flattening is the most efficient solution to the issues caused by SPF's SPF search limit. Flattening is replacing all domains listed in the SPF record with their IP addresses, and it will eliminate the need for DNS lookups.

EmailAuth is a professionally designed software for protecting your domain's email. It comes with the Automatic Flattening feature that automatically reduces the size of your SPF record, making it easy required on your part.

#2 MULTIPLE SPF RECORD

If you're thinking about what number of SPF records you could have on one domain, the best answer is "ONE". If your domain contains multiple SPF records, nobody can tell which will be used by sending a mail server to search whether they can verify SPF authentication. It can prevent certain genuine emails from getting delivered to your customers, thereby impacting your domain's ability to deliver emails at a high rate.

Check that the DNS query of the type TXT will result in only one TXT record, which begins with the v=spf1. If you are required to add additional features to the SPF record, ensure that you include them in the existing record rather than making a new record.

#3 SYNTAX ERRORS

To ensure the accuracy of your SPF record is functioning correctly, it is crucial to ensure that it's constructed properly. Various frequent syntax errors could result in your emails failing SPF authentication, stopping their delivery.

Here's an example of proper syntax for SPF:

v=spf1 a MX ip4:192.168.0.1/16 include:returnpath.com include:xyz.com ~all

Here's an overview of the most frequent syntax mistakes to keep in your head:

There shouldn't be any extra spaces before the start of the string (v=spf1)

There shouldn't be any extra spaces following the string's conclusion (~all)

Verify that there aren't any spelling errors in any records' mechanisms, such as include, ip4, etc.

Be sure that there aren't any spelling mistakes within any domains that are referenced.

Take out any uppercase characters that are in the Ip6 or IP4 mechanisms.

Eliminate any special characters such as dashes before using the fail-hard mechanism. For example, substitute -all for -all.

Check that there is one space and there are no commas between each mechanism.

Be sure to start your string with v=spf1 rather than any other mechanism, such as IP4.

#4 OVERLOOKING DOMAINS THAT DO NOT SEND EMAILS

Many people safeguard their active mail sending domains by using SPF and do not bother to put all that effort into making an SPF record of domains that aren't sending mail. Cybercriminals frequently spoof domains that don't send mail to bypass the defences of an organization. If you own several domains which don't send emails, the most effective thing you can do is create null SPF records for them.

The publication of a null SPF record ("v=spf1 -all") for any domain explicitly states that the domain doesn't send emails. For instance, if your domain example.com isn't used to send emails, you could create the following SPF record for it:

"v=spf1 a:mail.example.com -all"

Keep these common SPF mistakes in mind when you create an SPF account for the domain you are using to ensure that you are providing the proper security for your email.

Original source: https://medium.com/@rawatnimisha/4-common-mistakes-to-avoid-while-creating-an-spf-record-7a32162c813d

#spf #dmarc #dkim #senderpolicyframework

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